Explain how work done on a gas can lead to an increase in its internal energy.

When work is done on a gas, energy is transferred to the gas particles, increasing their kinetic energy. This increase in kinetic energy raises the internal energy of the gas, which can result in a rise in temperature.

Boundary lens: Keep this separate from nearby specification points that use similar words but test a different idea. This question asks: Explain how work done on a gas can lead to an increase in its internal energy. The correct response is When work is done on a gas, energy is transferred to the gas particles, increasing their kinetic energy. This increase in kinetic energy raises the internal energy of the gas, which can result in a rise in temperature., because gas pressure comes from particle collisions with container walls. In Increasing the pressure of a gas (physics only) (HT only), the marking point should connect directly to (Physics only) (HT only) Apply conservation of energy reasoning to work done on a gas. If the question includes values, the working must keep the appropriate unit and operation; if it is an explanation, it must name the relevant particle behaviour or energy change. This item belongs to Particle model and pressure, so avoid answers that switch to a different quantity, confuse heat with temperature, or describe gas pressure without collisions when collisions are the reason. Checkpoint 634 is distinct because it uses this exact question context and the boundary lens rather than a generic particle-model sentence.